Wanyifa Titanium Ti M5x30mm Bolt Nut Washer for Thomson Seatpost Cycling Bolts Go to amazon.com Related posts Best seatpost bolt for 2022 FeatureMaterial: 6AL/4V(TC4)Titanium Alloy,Grade 5Bolt size:M5x30mmNut Size:length 15.5mm/0.61'',Diameter:8.5mm/0.33''Total 12 gram2 Bolts, 2 Nuts & 2 Washers for Thomson Seatpost